Where to specify `generated-frontmatter-title`

[codingisacopingstrategy]

In heading-conf.rnc:

    ## If there is content before the first splitting point,
    ##           it will be referred to by the toc as 'Frontmatter' or, if present, the
    ##           value of generated-frontmatter-title. If generated-frontmatter-title 
    ##           is the empty string (or whitespace-only), the toc entry will be left out.

Where can I specify this generated-frontmatter-title?
In epub-config.xml?

BTW, ‘Frontmatter’ is not an ideal default, according to my dictionary the spelling is ‘Front matter’.

Since in this case it will be most likely will be used in title case, I would go for the default: ‘Front Matter’. I would have made a pull request, but I’ve seen this value used in various places and was afraid to break things…

Cheers,